Easy to read but rigorous in its attention to detail and technique, this graduate-level text covers expansion in a series of orthogonal functions and preliminary notions of Hilbert space, expansion in Fourier series and in series of Legendre polynomials and spherical harmonics, and expansions in Laguerre and Hermite series.
Series: Dover Books on Advanced Mathematics
Translation of: Sviluppi in serie di funzioni ortogonali
Reprint. Originally published: Rev. English ed. New York : Interscience, 1959. (Pure and applied mathematics ; vol. 9)
Includes bibliographical references (p. 399-408) and index